Hormonal regulation of the cycle

The oestrous cycle requires hormonal control.

Which are the hormones in charge of this regulation?

  

GnRH ultimately controls reproduction  

GnRH action

GnRHGonadotropin Releasing Hormone is secreted by the hypothalamus causing the release of FSH and LH. is synthesised and released by the neurons of the hypothalamusThe part of the brain that lies below the thalamus, forming the major portion of the ventral region of the diencephalon and controls autonomic nervous activities and part of the hormonal system. in the form of pulses or surges. Each secretion of GnRHGonadotropin Releasing Hormone is secreted by the hypothalamus causing the release of FSH and LH. provokes production and secretion of FSHFollicle Stimulating Hormone: responsible for the growth of ovarian follicles. and LHLuteinising hormone: responsible for the final maturation of the follicle and ovulation. by the anterior pituitaryGland located at the base of the brain just below the hypothalamus. It is divided into an anterior lobe, and a posterior lobe. The anterior lobe or adenohypophysis secretes FSH and LH, prolactin, growth hormone GH, TSH and ACTH. The posterior lobe secretes oxytocin and vasopressin. gland.

What is the action of FSHFollicle Stimulating Hormone: responsible for the growth of ovarian follicles.?

 

 

 

The main intrinsic factors are the ovarian hormones  

Progesterone and oestradiol inhibit GnRH production

 

 

The oestrous cycle is also influenced by external factors.

  

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